Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f51e784fe694c66…

MALICIOUS

PDF

35.0 KB Created: 2021-05-23 20:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14013c7bed1e9649ce7617f70d0734b3 SHA-1: 3e4bf033e1cb731fc0d0e5d075f3c2cafd0b0c17 SHA-256: 9f51e784fe694c66d1122aa4a171d4b5ac421e26282cb101ad431ccb861832c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with themes like "free generator" and "game hack". The embedded URLs, such as https://netcdn.xyz/app/835599320/free-tiktok-likes-generator-game-hack, are associated with malicious redirector infrastructure. The presence of a visual download button further supports a malicious workflow aimed at tricking the user into clicking through to a potentially harmful site or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/835599320/free-tiktok-likes-generator-game-hack In PDF document text
    • http://www.nicoifruttidelchicco.org/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C1B 26468 bytes
SHA-256: 94dcb2fd22ef5a4e2b1317bc67e29432d2f39573848b8c35d9b7f2a6f1c3a350
font_01_sfnt_off00006906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6906 17684 bytes
SHA-256: 5a858a9ba580e5964a46b2eec995bc00b893a7f5d7a57062f00620da516a4987

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